So how do ground Vehicles really help

[ThePyroRussian]

So as I was playing as tank I realized that every single base basically has been made into only infantry can really or effectively go into it as in you got the buildings and the huge walls so there really is no getting anything in there and ground vehicles kinda just seem limited in really helping to capture a base. So here lays the problem I see that you spend resources to acquire say a tank then you get to a base and your stuck with A.) get out of the vehicle and go in there which means leave the tank and it will probably get destroyed by c4 Or B.) You stay in the tank and you protect it and don't really support the team at all. This kinda leaves a gap in the practicality of ground vehicles that should be filled because there is no fun in A.) or B.) for some one who gets a Vehicle that they spent resources.